/Engine/Plugins/Enterprise/DatasmithImporter/Source/DatasmithImporter/Public/ObjectElements/DatasmithUObjectElements.h
Set the path of the Ies definition file
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category="Datasmith | Element") void SetIesFile ( const [FString](API\Runtime\Core\Containers\FString) & IesFile )